knot weed problem

Asked June 27, 2017, 11:28 AM EDT

I have knot weed growing into my yard from the boarding woods. I have tried spraying roundup on the plants, but they seem to be resistant. I have also tried to pull the weeds and roots, but that is a fruitless battle. What can I do to get rid of them?

Howard County Maryland

1 Response

This plant can be difficult to control and is invasive.
Here is information from one of the best resources available
As it mentions, to be sure that the herbicide adheres to the leaf well, mix a surfactant with the herbicide. (It makes it stickier.)
Take a look at our video on knotweed